| 摘要 |
FIELD: manufacture of porous sound-absorbing ceramic bricks, tiles or slabs possessing high sound-absorbing properties in wide range of frequencies. ^ SUBSTANCE: proposed porous sound-absorbing article is made from porous ceramic material with communicating pores at specific gravity of 0.5-1.0; for obtaining such material, 100-200 parts by weight of at least one sintered material is added to 100 parts by weight of pearlite at grain diameter of 0.50-2.0 mm; sintered materials are selected from group containing ash dust, wollastonite, chamotte, slag, quartz, lava, stones or clay as basic material, 10-20 parts by weight of inorganic binder; then, mixture is sintered; pearlite particles make material porous since pearlite particles get surrounded with basic material and binder after sintering; communicating pores are formed between contact surfaces of particles. Specification gives characteristics of versions of porous sound-absorbing ceramic article and method of its production. ^ EFFECT: enhanced efficiency of sound absorption in wide range of frequencies. ^ 45 cl, 3 dwg, 3 ex |
